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onsemi MC74HC02AFR2
- Part No.:
- MC74HC02AFR2
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MC74HC02AFR2.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MC74HC02AFR2 from onsemi is a quad 2-input NOR gate IC in SOIC-14 package, operating from 2.0 V to 6.0 V, delivering 10 LSTTL load drive capability with 1.0 µA max input current and propagation delay as low as 13 ns at VCC = 6.0 V. It interfaces directly to CMOS, NMOS, and TTL logic families and is used in digital control logic, address decoding, and reset signal conditioning in industrial microcontroller systems.
For engineers reviewing the MC74HC02AFR2 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, JEDEC-compliant timing behavior, real-world interface compatibility (including LS02-pin-compatible operation), and validated alternative options for logic-level translation and combinational gate replacement.
Technical Context
The MC74HC02AFR2 implements four independent 2-input NOR gates using high-performance silicon-gate CMOS technology. Each gate exhibits rail-to-rail output swing, guaranteed noise immunity per JEDEC Std. 7A, and input thresholds defined by VIH ≥ 70% VCC and VIL ≤ 30% VCC across temperature.
It supports mixed-voltage system interfacing via its wide 2.0–6.0 V supply range and LSTTL-compatible inputs when used with pullup resistors. Propagation delays (tPLH/tPHL) and transition times (tTLH/tTHL) are fully characterized from –55°C to +125°C with CL = 50 pF and input rise/fall times ≤ 6 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Quad 2-input NOR gate - provides four independent Boolean OR-NOT operations in one package. |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct use in 3.3 V and 5 V systems without level shifting. |
| Max Propagation Delay | 13 ns at VCC = 6.0 V (CL = 50 pF) - ensures timing-critical combinational logic meets sub-15 ns path budgets. |
| Output Drive | 10 LSTTL loads - supports fanout to legacy TTL circuitry without buffer amplification. |
| Input Leakage Current | ±1.0 µA max at VCC = 6.0 V - minimizes static power draw and prevents unintended node loading in high-impedance circuits. |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and automotive under-hood environments. |
| ESD Protection | Integrated protection circuitry - guards against damage from human-body-model (HBM) electrostatic discharge. |
Pinout & Package
MC74HC02AFR2 is housed in a 14-lead SOIC package (Case 940A-03, JEDEC MS-012 variant), with standard 1.27 mm lead pitch and gull-wing surface-mount terminals. Pin 1 is marked by a beveled corner or notch; pin 7 is GND and pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input A/B of NOR gates | Eight total inputs - two per gate (A1/B1 through A4/B4); compatible with CMOS outputs and LSTTL (with pullups). |
| 3, 6, 10, 13 | Output Y1/Y2/Y3/Y4 | Four independent NOR outputs - each capable of sourcing/sinking ±25 mA (DC), driving 10 LSTTL loads. |
| 7 | GND | Ground reference for all logic and power domains - must be low-impedance connection to system common. |
| 14 | VCC | Positive supply rail - decoupling capacitor (0.1 µF ceramic) required within 10 mm of this pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| LS02 pinout compatibility | Direct drop-in replacement for 74LS02 in existing PCB layouts - no redesign needed for legacy TTL-to-CMOS upgrades. |
| Rail-to-rail CMOS output swing | VOH ≥ VCC – 0.1 V and VOL ≤ 0.1 V at light loads - ensures robust logic-level margin across full supply range. |
| High noise immunity | CMOS threshold symmetry (VIH/VIL ratio ~2.3× at VCC = 5 V) - rejects >400 mV of coupled noise on input lines. |
| Low quiescent ICC | 40 µA max at VCC = 6.0 V and TA = +125°C - enables use in always-on monitoring circuits with µA-level standby budgets. |
| JEDEC Std. 7A compliance | Fully conforms to industry-standard AC/DC parametric limits for high-speed CMOS - simplifies qualification in regulated applications. |
Applications
| Industrial PLC I/O Conditioning | Microcontroller Reset Logic |
|---|---|
Use Scenario: Generating synchronized active-low reset pulses across multiple peripheral ICs during power-up sequencing in programmable logic controllers. IC Role / Device Role / Timing Role: NOR gate configured as an active-low OR function - combines watchdog timeout, manual reset, and power-fail signals into a single reset assertion line. Use Value: Eliminates discrete diode-OR networks; leverages guaranteed 13 ns max delay to meet tight 100 ns reset assertion windows. |
Use Scenario: Debouncing and synchronizing mechanical push-button inputs before feeding them to interrupt-capable GPIO pins on ARM Cortex-M microcontrollers. IC Role / Device Role / Timing Role: Dual-NOR latch (cross-coupled configuration) - provides metastability-hardened edge detection and contact bounce suppression. Use Value: Achieves <1 µA static current draw while maintaining sub-20 ns setup/hold margins relative to MCU clock domain. |
| Automotive Body Control Module | Legacy System Interface Adapter |
Use Scenario: Translating 12 V switched inputs (via resistor-divider) into clean 5 V logic levels for door lock actuator control logic in body electronics modules. IC Role / Device Role / Timing Role: Level-shifting NOR gate - uses internal CMOS thresholds to reject battery ripple and load-dump transients up to ±100 mV. Use Value: Replaces dual-transistor level shifters; operates reliably over –40°C to +125°C ambient with no external biasing components. |
Use Scenario: Interfacing vintage 74LS-series logic boards with modern 3.3 V FPGA-based controller cards in test equipment retrofit projects. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant gate - accepts 5 V LSTTL inputs (with pullups) and drives 3.3 V CMOS loads without external resistors. Use Value: Enables seamless integration without level translators; maintains <15 ns propagation delay matching original LS02 timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC02DR | TI part; identical logic function, same SOIC-14 package, but specified only to +85°C (vs. +125°C for MC74HC02AFR2). | Not recommended for under-hood automotive or extended-temperature industrial deployments requiring full –55°C to +125°C operation. | Select MC74HC02AFR2 when extended temperature range, JEDEC 7A compliance, or onsemi's long-term product continuity are required. |
| 74VHC02M | ON Semiconductor's newer VHC family; lower propagation delay (8 ns @ 5 V), but higher ICC (100 µA typical) and narrower VCC range (2.0–5.5 V). | Better for high-speed clocked logic, but unsuitable for 6.0 V systems or ultra-low-quiescent-power designs where MC74HC02AFR2's 40 µA max ICC matters. | Choose MC74HC02AFR2 for 6 V operation, lowest leakage, or drop-in LS02 replacement; choose 74VHC02M only when sub-10 ns timing dominates design priorities. |
Compared with SN74HC02DR and 74VHC02M, the MC74HC02AFR2 uniquely balances extended temperature support, 6 V tolerance, and µA-level quiescent current - making it optimal for cost-sensitive, thermally demanding, or legacy-compatible digital control nodes.
Availability
MC74HC02AFR2 is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, microcontroller reset logic, automotive body control modules, and legacy system interface adapter applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74HC02AFR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in automotive, industrial, cloud, and medical end-markets.
The MC74HC02AFR2 belongs to the HC (High-Speed CMOS) logic family, designed specifically for pin-compatible upgrades from bipolar TTL logic while delivering lower power, higher noise immunity, and broader supply voltage flexibility.
FAQ
What is the maximum operating temperature for the MC74HC02AFR2?
The MC74HC02AFR2 is rated for operation from –55°C to +125°C across all package types. This extended temperature range is confirmed in the Recommended Operating Conditions table of the official datasheet (Rev. 8, March 2000), making MC74HC02AFR2 suitable for under-hood automotive and harsh industrial environments where standard commercial-grade logic would fail.
Is the MC74HC02AFR2 pin-compatible with the 74LS02?
Yes, the MC74HC02AFR2 is explicitly stated in its datasheet to be identical in pinout to the 74LS02. This allows direct PCB-level replacement in legacy TTL designs without layout changes. However, note that MC74HC02AFR2 requires appropriate pullup resistors on inputs when interfacing with LSTTL outputs to ensure valid logic-high recognition.
What is the typical propagation delay of the MC74HC02AFR2 at 5 V supply?
At VCC = 5.0 V and CL = 50 pF, the MC74HC02AFR2 exhibits a typical propagation delay of 15 ns (tPLH/tPHL), with a guaranteed maximum of 19 ns over temperature. These values are measured per Figures 1 and 2 in the datasheet and reflect worst-case performance across the full –55°C to +125°C range.
Does the MC74HC02AFR2 require external pullup resistors on its inputs?
The MC74HC02AFR2 inputs are compatible with standard CMOS outputs without pullups, but require external pullup resistors (typically 1–10 kΩ to VCC) when driven by LSTTL outputs to ensure VIH exceeds the minimum high-level input voltage threshold (e.g., ≥3.15 V at VCC = 4.5 V). This requirement is documented in the device's functional description and DC Electrical Characteristics tables.
What package type does the MC74HC02AFR2 use, and what is its case outline?
The MC74HC02AFR2 uses a 14-lead SOIC package conforming to Case Outline 940A-03 (EIAJ standard), with 1.27 mm lead pitch and gull-wing leads. This is distinct from the more common 751A-03 (JEDEC MS-012) used by MC74HC02ADR2 - confirmed by the Marking Diagram and Ordering Information sections of the datasheet.
MC74HC02AFR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Max):
- 1 µA
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Input Logic Level - Low:
- 0.5V ~ 1.8V
- Input Logic Level - High:
- 1.5V ~ 4.2V
- Max Propagation Delay @ V, Max CL:
- 13ns @ 6V, 50pF
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
MC74HC02AFR2 FAQ
1.How can I place an order for MC74HC02AFR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC02AFR2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC74HC02AFR2 reliable?
The price and inventory of MC74HC02AFR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC02AFR2 is usually 5 days.
3.What payment methods are accepted for MC74HC02AFR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC02AFR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC02AFR2?
MC74HC02AFR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC02AFR2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC74HC02AFR2?
For technical support, including MC74HC02AFR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC02AFR2 requirements.
6.How does Aetrix verify that MC74HC02AFR2 is sourced from the original manufacturer or authorized distributors?
All MC74HC02AFR2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC74HC02AFR2 meets industry standards.
7.What is the process for return or replacement of MC74HC02AFR2?
All MC74HC02AFR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC02AFR2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC74HC02AFR2 part is unused and in its original packaging.
Return procedure for MC74HC02AFR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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